agroforestry: a tool for sustainable nutrition? - unscn · nutrition, income, ... agroforestry...
TRANSCRIPT
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• We are one of the 15 global reasearch centres of the Consultative Group on International Agricultural Research (CGIAR)
• We are dedicated to generating and applying the best available knowledge to stimulate agricultural growth in developing countries, raise farmers’ incomes, and protect the environment.
– Our Vision: a rural transformation in the developing world as smallholder households increase their use of trees in agricultural landscapes to improve their food security, nutrition, income, health, shelter, energy resources and environmental sustainability.
– Our mission: generate science-based knowledge about the diverse roles that trees play in agricultural landscapes, and use this research to advance policies and practices that benefit the poor and the environment.
Who are we?
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Our research priorities
1. Domestication, utilization and conservation of superior agroforestry germplasm.
2. Maximizing on-farm productivity of trees and agroforestry systems.
3. Improving tree product marketing and extension for smallholders.
4. Reducing land health risks and targeting agroforestry interventions to enhance land productivity and food availability.
5. Improving the ability of farmers, ecosystems, and governments to cope with climate change.
6. Developing policies and incentives for multi-functional landscapes with trees that provide environmental services.
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Our participation in the CGIAR Research Programmes (CRPs)
• CRP 1 Integrated Agricultural Systems
• CRP 2 Policy research
• CRP 4 Health and Nutrition
• CRP 5 Land and Water
• CRP 6 Forests, Trees and Agroforestry
• CRP 7 Climate Change and Agriculture
World Bank World Development Indicators
South Asia
0
500
1000
1500
2000
2500
3000
3500
4000
4500
5000
1960 1965 1970 1975 1980 1985 1990 1995 2000 2005
Kg
per
Hec
tare
Sub-Saharan Africa
Latin America
East Asia
Cereal yields by region
Fruit & veg consumption
Modified after: Msangi and Rosegrant 2011. Feeding the Future’s Changing Diets.
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African facts
• Population growth has rendered fallowing impossible in many communities
• Land overuse is depleting soil organic matter, soil carbon and soil microbiology
• Consequently, across drylands Africa, soil fertility is dropping by 10-15% a year (Bunch, 2011)
• Deep poverty and logistical bottlenecks makes fertiliser unaffordable for most
• Funding for fertiliser subsidies is scarce and fickle
Where will soil fertility, soil organic matter and extreme weather resilience come from ?
Impact of fertilizer trees on maize yield
under farmer management _______________________________________
maize yield (t/ha)
Maize only 1.30
Maize + fertilizer trees 3.05
____________________________________________________________
2011 Survey of farms in six districts (Mzimba, Lilongwe, Mulanje,
Salima, Thyolo and Machinga)
Drought Drought Flood
P addition
resumed
Long-term maize yield without fertilizer
in a Gliricidia system
P stopped
Farmer-Managed Natural Regeneration Zinder, southern Niger in the 1980s
In FMNR, farmers will select the best shoots from trees regrowing naturally from stumps and eliminate the rest. This promotes the growth of vigorous new trees adapted to local conditions.
Today, there are 5 million hectares of millet production in Faidherbia parklands
in Niger, producing 500,000 tons of extra grain a year !
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Kantché district, Zinder, Niger
District of 350,000 people, with high tree on-field densities. Rainfall averages ca. 350 mm per year, typical of Sahel drylands.
Annual district-wide grain surplus:
2007 21,230 tons
2008 36,838 tons
2009 28,122 tons
2010 64,208 tons
2011 13,818 tons
Kantché produces grain surpluses even in drought years. This is mostly exported to northern Nigeria, providing cash revenue.
Yamba & Sambo, 2012
Where will Africa’s nutrition come from?
Modified after: Msangi and Rosegrant 2011. Feeding the Future’s Changing Diets.
Vit A & C: indigenous beat exotics
Sources: Freedman (1998) Famine foods.
http://www.hort.purdue.edu/newcrop/FamineFoods; Fruits
for the Future Series, ICUC; Fineli (http://www.fineli.fi/), etc.
Domestication of Agroforestry Trees producing food and non-food products
Creation of early fruiting, low stature, productive cultivars with high
quality and uniformity
Cultivar meeting market
specifications
Fruiting
cultivar
Simple and appropriate
propagation technology
Tree-to-tree
variation within a
village population
0
50
100
150
200
Individual trees
Ma
ss
(g
)
Kernel mass
Shell mass
Flesh mass
Quantification of Important Traits
%a-santalol
0.0
5.0
10.0
15.0
20.0
25.0
30.0
35.0
40.0
45.0
50.0
% a
-san
talo
l
0
2
4
6
8
10
12
1 4 7 10 13 16 19 22 25 28 31 34 37 40 43 46 49 52 55 58 61 64 67 70 73 76 79 82 85
Individual trees
Mass (
mg
)
stearine (mg) oleine (mg)
Fruit
morphology
Medicinal
properties
Essential
oils Edible oils
and fatty
acids
Elite
trees
for
select
ion
Techniques allow multiple trait selection
for different markets
Participatory Tree Domestication (PTD)
Put simply PTD refers to:
the means communities select, propagate and manage high-value indigenous fruit trees and medicinal plants and integrate them in the various farming systems,
Species for domestication are mainly selected encompassing indigenous knowledge and genetic selection based on scientific principles
A strong partnership is developed with scientists, civic authorities and private companies.
PTD is a farmer driven and market lead process. It focuses on species farmers consume best with high potentials for local, regional and international markets
Gnetum
africanum
SPECIES UNDER DOMESTICATION
Irvingia gabonensis
Ricinodendron heudelotii Kola nitida
Nutritional benefits of indigenous fruits
Species Dacroydes
edulis
fruit
(88% dm)
Irvingia
gabonensis
kernels
(88% dm)
Maize
grain
(86% dm)
Rice
grain
Cassava
tuber
(30-35%dm)
Carbohydrates 14 26-39 66-76 46-59 24-31
Fats/oils 32 51-72 2-6 1-2 <1
Protein 26 7.4 5-14 4-8 1
Fibre 18 1 1-3 1-4 1-2
Data on micronutrients, fatty acids, etc.
in Leakey 1999, Food Chemistry 64, 1-
14.
Harvest periods of selected priority indigenous
fruit/nut species of West and Central Africa.
Tree species Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Irvingia wombolu
Cola spp.
Dacryodes edulis
Garcina kola
Irvingia gabonensis
Ricinodendron heudelotii
RURAL RESOURCE CENTERS
Innovative approach helping farmers to be exposed to updated technologies in domestication and agroforestry. Demonstration plots helping farmers to acquire skills in
producing NTFPs and marketing knowledge
.
Differences with the classical agricultural extension approach
More scope for joint research, adaptation, training, sharing and diffusion of good practices and technologies
Better partnership between research, civil society organisations and farmers
More flexibility in activities, room for testing and adaptation
Gradual development
Efforts to be self-sustaining
Infrastructure
Tree nursery
training hall and
offices
Agroforestry demonstration plots
Small library
Experimenting together with farmers
vegetative propagation techniques on
species prioritised by communities
Exchanging planting material
between resource centres
Learning from each other during study visits
Activities
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Why agroforestry?
• Agroforestry lets farmers grow more food, fodder and fuel while managing agricultural landscapes for critical ecosystem services - sustainably.
• Agroforestry helps curb greenhouse gas emissions by slowing the conversion of forest to farmland and by sequestering more carbon on farms (in trees and the soil).
• Agroforestry can involve hundreds of highly nutritious species, many of which are still relatively unknown.
Malawi is one of African 16 countries (April 2012) that are implementing or setting up National Evergreen Agriculture Action Plans, and the seat of the World Agroforestry Centre’s Southern Africa hub.
Malawi National Agroforestry Food Security Programme
Gliricidia, a leguminous coppice tree, interplanted with maize. The leaves are cut and turned over into the topmost soil layer, providing nitrogen and other nutrients
Fertilizer tree options: from the short to the long term
Relay Fallow
intercropping
(grain yield: 2-3
tons)
Improved Fallows (grain yield: 3-4 tons)
Gliricidia / Maize
intercropping
(grain yield 3-5 tons)
Faidherbia/ Maize
intercropping
(grain yield 3-5+
tons)
Waiting period before benefit accrues
1 year 2 years 3 years 5+ years
• Increased crop nutrient availability in rainfed food crop systems
• Improved microclimate and soil water relations conveying greater adaptation to climate change
• Increased and more stable food crop productivity
• Increased food micronutrient availability (fruits)
• Enhanced dry season fodder availability
• Dramatically increased carbon accumulation in food crop systems: 6-10 tons of CO2 per hectare per year are common
• Enhanced biodiversity
• Reduced deforestation due to on-farm fuelwood and timber production
What trees give to farms:
Because it works, agroforestry is spreading across Africa, both from the grassroots and through government programmes. Because the defining feature of these agroforestry fields is that they carry living vegetation all year around, we call this "evergreen agriculture". This spread must be hugely speeded up to meet the needs of tens of millions of smallholder farmers.
The evergreen agriculture vision: • EverGreen Agriculture is emerging as an affordable and accessible science-based solution to
regenerate the land on small-scale farms and increase family food production and cash income.
• EverGreen Agriculture is a form of more intensive farming that integrates trees with annual crops.
The vision of EverGreen Agriculture is to sustain a green cover on the land throughout the year,
increasing food and fodder production sustainably.
• EverGreen farming systems feature both perennial and annual species (trees and food crops). The
overall indicator of their effectiveness is building a healthy soil and environment, while increasing
the resilience of the farm enterprise to a variety of risks. They deliver extended growing seasons,
increased productivity, better water utilization efficiency, and drought resilience.
• Millions of women and men farmers in Zambia, Malawi, Niger, Burkina Faso, and other countries
are already practicing EverGreen Agriculture, successfully restoring exhausted soils with richer
sources of organic nutrients, and dramatically increasing both their crop yields and incomes.
• More countries are joining the Evergreen Partnership almost monthly: see
http://evergreenagriculture.net for details and regular updates.
Government example: in December 2011, the Ethiopian PM announces national plan to raise 100 million Faidherbia trees in farmers’ fields
Existing systems are not recognised for what they are (ex:Faidherbia agroforest in Senegal)
What’s wrong with this picture? All the trees are old and risk declining soon. These lands are not being managed for replacement tree growth.
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Growing Evergreen Agriculture on farms • Offer support to countries launching evergreen agriculture programmes:
• Help establish the right policies
• Technical support to define and establish best systems
• Boost extension services reach and quality
• Research, develop and support the implementation of scaling up and scaling out to many millions of smallholders
• Support to pioneer farmers, to national extension services, to NGOs and INGOs
• Encourage more partnerships between research, development, and private sector institutions
• Help spread the idea of “trees on farms” further at national and international levels
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• Grow the science by encouraging research partnerships across the region to tackle key questions:
• Develop systems adapted to as many agroecological regions as are encountered
• Resolving complex policy issues
• Enhancing targeting & scaling-up
• Ensure quality tree genetics and plentiful tree seed supplies
• Enhance tree propagation and establishment
• Adapt to integrated production systems
• Estimate potentials for climate change adaptation
• …
Building the science of Evergreen Agriculture
Agroforestry and EverGreen Agriculture are •fresh, low-cost approaches to land regeneration and food security that have their roots in Africa and are spreading across the tropics and that are
•being adopted by millions of smallholders.
•Poor households should be targeted over large areas to end hunger on small farms; working in the
•many nations that are creating the policy and institutional environments to favor adoption.
•Research is critical to underpin the acceleration of more widespread adoption
Conclusion
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For more information
Patrick Worms, World Agroforestry Centre
Email:[email protected]
Tel: +32 495 24 46 11
www.worldagroforestrycentre.org
www.worldagroforestrycentre.org/evergreen_agriculture
http://evergreenagriculture.net/about-evergreen-agriculture